How AI detectors work — and where they fall short
What a detection score actually measures, why short texts are hard to judge, and how to read a result responsibly.
· 7 min readFree AI detector + AI humanizer for every kind of writing
Write with confidence.
Check whether your text reads as AI-generated, see exactly why, and rewrite it into clear, natural language — without losing your meaning, citations or numbers.
Who it’s for
Built for how you write.
Whatever you’re writing, Humanizely helps it sound clear, natural and yours.
Bloggers & content writers
Edit AI-assisted drafts so articles read like you wrote them, before they go live.
Academics & researchers
Check papers and reports, and keep technical terms, citations and figures untouched.
Professionals
Polish emails, proposals and reports into clear, confident language in the tone you need.
Personal use
Cover letters, applications, personal statements: make everyday writing sound like you.
AI Detector · free & unlimited
See what reads as AI — and why.
Get an overall score, the sentences behind it, and a plain-language reason for every flag.
- Overall AI probability with a human / AI split
- Sentence-level highlights you can click into
- A reason and a suggestion for every flag
PCOS Literature Review18% AI
Polycystic ovary syndrome affects a substantial share of women of reproductive age, yet the criteria used to diagnose it remain contested. It is important to note that the heterogeneity of PCOS presents significant challenges for researchers and clinicians alike. Most studies relied on the Rotterdam criteria. This review synthesizes current evidence on diagnostic approaches.
Humanizer · 2 free a day
Rewrite it into natural language.
Choose a tone and how strongly to rewrite, then compare every change before you accept it.
- Natural, Academic, Professional, Simple and Formal tones
- Keeps meaning, technical terms, citations and numbers
- Side-by-side compare so you approve every change
How it works
Three steps, about a minute.
- 01
Paste your draft
An article, a paper, a cover letter — anything you wrote or drafted with help.
- 02
Review the signals
See your score, the passages that read as AI, and why each one was flagged.
- 03
Rewrite what matters
Humanize the flagged passages, compare the changes, and keep the version you like.
Signals, not verdicts
Honest about what detection can do.
A single percentage tells you very little. We show the sentences behind every result and the reason each was flagged, so you can judge the writing yourself.
AI detection is probabilistic and should never be treated as proof of authorship. Read our disclaimer.
Explained results
Every flag comes with the reason it was raised and what you could change.
Your meaning stays intact
Names, figures and citations are kept, and every rewrite is checked against your original.
Your text isn’t stored
We process your text to return a result and don’t keep it. History stays in your browser.
Secure checkout
Payments are handled by our payment provider. We never see your card details.
Pricing
Compare plansStart free. Upgrade when you write more.
Annual: 2 months free
Free
$0forever
Unlimited AI detection and 2 humanizations a day, up to 250 words each.
Start freeWriter
$5.00/ month
Billed $59.99 a year10,000 words a month, up to 1,000 per rewrite, plus unlimited detection.
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RECOMMENDED$10.00/ month
Billed $119.99 a year25,000 words a month, up to 2,000 per rewrite, plus unlimited detection.
Get AuthorStudio
$20.83/ month
Billed $249.99 a year60,000 words a month, up to 3,000 per rewrite, plus unlimited detection.
Get StudioFrom the blog
All articlesWrite better, with or without AI.
15 phrases that make writing sound machine-made
Stock openers, stacked transitions and tidy triplets: the habits that make prose feel generated, and what to write instead.
· 6 min readUsing AI responsibly in academic writing
Where AI help is usually fine, where it isn’t, and how to keep your own voice and your citations intact.
· 9 min readIs an AI score proof that someone used AI?
No. Detection is probabilistic. Treat a score as a prompt to reread the flagged passages, never as a verdict on authorship.
Who is Humanizely for?
Anyone who writes: bloggers and content writers, academics and researchers, professionals, and people working on personal writing like cover letters.
Will the Humanizer change my citations or numbers?
It is built not to. Every rewrite extracts the facts, names, figures and citations first, then checks the result still carries the same meaning before you see it. You compare every change before you keep it.
What does the free plan include?
Unlimited AI detection and 2 humanizations a day of up to 250 words each. The daily count resets at midnight UTC. No card needed.
How do payments and cancellations work?
Paid plans renew monthly or yearly until you cancel, and you keep paid features until the end of the period you paid for. See our Refund Policy.
Is my text stored?
No. Text you check or rewrite is processed to produce your result and is not saved on our servers. Your history stays in your own browser, and you can clear it any time. See our Privacy Policy.